Re: globalsat bu-353 usb gps using serial or ps2 port

I am happy to report that I got the BR-355, which has a data connection
via the serial port rather than an imaginary serial port via USB. Now
I can run the GPS, Deluo Routis 2004, while playing mp3's without any
skipping or hiccups on my P200 laptop with 96MB of ram.

Spacey Spade wrote:
> Because I believe my P200 laptop can't handle the USB gps and playing
> mp3s at the same time (without skips in mp3 playback), I tried hooking
> up the BU-353 gps via the ps-2 port with one of those adapters you get
> for the mouse. The gps gets power and is blinking, having locked it's
> coordinate position (in my bedroom!). However, Deluo Routis 2004 does
> not "auto detect" the gps, saying there is no gps hooked to the
> computer. Is there any way to make this work?
>
> If anyone has seen a USB -> Serial -> Serial Port adapter, I can try
> that in addition to my current USB -> PS2 -> PS2 Port adapter I have
> now.
>
> TIA,
>
> Spacey
>
> [For-Soft]
> Is USB support slow in windows 98?
> USB mouse vs. PS2 or COM mouse. USB mouse does not work smoothly quite
> often when CPU is heavily used. PS2 mouse simply works.
> Reason?
> PS2 port requires much less CPU time in order to be serviced by the OS.
> Theory:
> The USB bus is run by the controller software driver. Any trasmition
> requires the driver to process it, because the USB bus is designed to
> be shared by many different devices in the same time. So, it is
> necesary to manage the USB bus with complicated and time consuming way.
>
> PCMCIA is a very interesting system. The PCMCIA card after initiating
> by the PCMCIA manager software behaves like a hardware component
> connected directly to the motherboard bus (ISA or PCI depending on the
> PCMCIA controller type). It is possible to access the PCMCIA card
> registers using CPU IO ports without any additional PCMCIA drivers.
> To put it simple PCMCIA driver is necesary only to configure the PCMCIA
> device. After that, the device works with it's own driver and it is not
> necesary to use PCMCIA controller software, any more.
>
> The point:
> The multi purpose of the USB bus is the cause of it's weakest point:
> high CPU demand.
>
> The USB is good for very fast computers. But, IO devices like LPT, COM
> or PS2 are handled faster by the OS.
> [/For-Soft]

.

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